In some Orthodox cultures, after the Vesperal Liturgy the family returns home to a festive meal, but one at which Orthodox fasting rules are still observed; i.e., no meat or dairy products (milk, cheese, eggs, etc.) are consumed (see below for variations according to nationality). Then they return to the church for the All-Night Vigil.

The next morning, Christmas Day, the Divine Liturgy is celebrated again, but with special features that occur only on Great Feasts of the Lord. After the dismissal of this Liturgy, the faithful customarily greet each other with the kiss of peace and the words: "Christ is Born!", to which the one being greeted responds: "Glorify Him!" (these are the opening words of the Canon of the Nativity that was chanted the night before during the Vigil). This greeting, together with many of the hymns of the feast, continue to be used until the leave-taking of the feast on December 29.

The first three days of the feast are particularly solemn. The second day is known as the Synaxis of the Theotokos, and commemorates the role of the Virgin Mary in the Nativity of Jesus. The third day is referred to simply as "the Third Day of the Nativity". The Saturday and Sunday following December 25 have special Epistle and Gospel readings assigned to them. December 29 celebrates the Holy Innocents.

Orthodox Christians observe a festal period of twelve days, during which no one in the Church fasts, even on Wednesdays and Fridays, which are normal fasting days throughout the year. During this time one feast leads into another: December 25â€“31 is the afterfeast of the Nativity; January 2â€“5 is the forefeast of the Epiphany.

In some parts of Central and Eastern Europe such as Russia, Ukraine, Poland, and Lithuania, a traditional meatless 12-dishes Christmas Eve Supper is served on Christmas Eve before opening gifts. This is known as the "Holy Meal". The table is spread with a white cloth symbolic of the swaddling clothes the Child Jesus was wrapped in, and a large white candle stands in the center of the table symbolizing Christ the Light of the World. Next to it is a round loaf of bread symbolizing Christ Bread of Life. Hay is often displayed either on the table or as a decoration in the room, reminiscent of the manger in Bethlehem. The twelve dishes (which differ by nationality or region) symbolize the Twelve Apostles.

The Holy Meal was a common Eastern Orthodox tradition in the Russian Empire, but during the era of the Soviet Union it was greatly discouraged as a result of the official atheism of the former former regime. It is coming back in Russia and continues to be popular in Ukraine.

The main attribute of Holy Meal in Ukraine is kutia, a sweet grain pudding. The other typical dishes are borscht, Varenyky, a traditional Christmas compote called uzvar and dishes made of fish, phaseolus and cabbage.

In accordance with the Christmas traditions of the Serbs, their festive meal has a copious and diverse selection of foods, although it is prepared according to the rules of fasting. As well as a round, unleavened loaf of bread and salt, which are necessary, this meal may comprise roast fish, cooked beans, sauerkraut, noodles with ground walnuts, honey, and wine.

In Bulgaria, the meal consists of an odd number of lenten dishes in compliance with the rules of fasting. They are usually the traditional sarma, bob chorba (bean soup), fortune pita (pastry with a fortune in it), stuffed peppers, nuts.[17] The meal is often accompanied with wine or Bulgaria's traditional alcoholic beverage rakia.

While other Christian families throughout the world celebrate the Christmas Eve meal with various meats, Italians and Sicilians celebrate the traditional Catholic "Feast of the Seven Fishes"[18] which was historically served after a 24 hour fasting period. Although pre-Christmas fasting is not a popular custom still practiced, Italian-Americans still enjoy meatless Christmas Eve feast[19] and attend the Midnight Mass.

In various cultures, a festive dinner is traditionally served for the family and close friends in attendance, when the first star (usually Sirius) arrives on the sky.

Families in some Slavic countries reserve a place for guests (alluding to Mary and Joseph looking for shelter in Bethlehem).

During the Reformation in 16thâ€“17th century Europe, many Protestants changed the gift bringer to the Christ Child or Christkindl, and the date of giving gifts changed from December 6 to Christmas Eve.[20] It is the night when Santa Claus makes his rounds delivering gifts to good children.

In most parts of Germany, Austria, and Switzerland, presents are traditionally exchanged in the evening of December 24. Children are commonly told that presents were brought either by the Christkind (German for: Christchild),[22] or the Weihnachtsmann (German name of Santa Claus). Both leave the gifts, but are in most families not seen doing so.

In Finland, Joulupukki, and in Sweden Jultomten, personally meets children and gives presents in the evening of Christmas Eve.[23][24]

In Netherlands, Argentina, Austria, Denmark, Estonia, Finland, Germany, Hungary, Slovakia, Iceland, Latvia, Norway, Poland, Portugal, Quebec, Romania, Uruguay, and Sweden, Christmas presents are opened mostly on the evening of the 24th, â€“ this is also the tradition among the British Royal Family, due to their mainly German ancestry[25] â€“ while in Italy, the United States, the United Kingdom, Ireland, English Canada, South Africa, New Zealand and Australia, this occurs mostly on the morning of Christmas Day.

In other Latin American countries, people stay awake until midnight, when they open the presents.

In Spain, gifts are traditionally opened on the morning of January 6, Epiphany day ("DĂ­a de Los Tres Reyes Magos"),[26] though in some other countries, like Argentina and Uruguay, people receive presents both around Christmas and on the morning of Epiphany day.

Christmas Eve is celebrated in different ways around the world, varying by country and region. Elements common to many areas of the world include the attendance of special religious observances such as a midnight Mass or Vespers, and the giving and receiving of presents. Along with Easter, Christmastime is one of the most important periods on the Christian calendar, and is often closely connected to other holidays at this time of year, such as Advent, the Feast of the Immaculate Conception, St. Nicholas Day, St. Stephen's Day, New Year's, and the Feast of the Epiphany.

The significant amount of vacation travel, and travel back to family homes, means that Christmas Eve is also frequently linked to social events and parties, worldwide.[28][29][30][31][32] Due to the family gathering and religious worship activities that are central to Christmas Eve for Christians but which Jews do not typically engage in,[33] a series of events on the night of December 24 have been made available to Jews in various regions of the world.[34] Matzo Ball events and parties are an option for single Jews. Jews in interfaith relationships may prefer to participate in Chrismukkah events and parties. However, Jewish people are invited to Christmas Eve parties and plenty will attend, and some host Christmas Eve parties for others.

During World War I in 1914 and 1915 an unofficial Christmas truce took place, particularly that between British and German troops. The truce began on Christmas Eve, December 24, 1914, when German troops began decorating the area around their trenches in the region of Ypres, Belgium, for Christmas. They began by placing candles on trees, then continued the celebration by singing Christmas carols, most notably Stille Nacht (Silent Night). The British troops in the trenches across from them responded by singing English carols. The two sides shouted Christmas greetings to each other. Soon thereafter, there were calls for visits across the "No man's land" where small gifts were exchanged. The truce also allowed a breathing spell where recently fallen soldiers could be brought back behind their lines by burial parties. Funerals took place as soldiers from both sides mourned the dead together and paid their respects. At one funeral in No Man's Land, soldiers from both sides gathered and read a passage from Psalm 23. The truce occurred in spite of opposition at higher levels of the military command. Earlier in the autumn, a call by Pope Benedict XV for an official truce between the warring governments had been ignored.